cavedweller wrote:

I also wonder if the 3 7/8 gallons referred to somewhere above hasn't
got a metric equivalent, such as 4 liters....well, it least in the
fourth decimal.

The containers that are just a fraction short of a gallon tend to be tint bases
or paint colors that can be used as a base. Tint bases come in different flavors
depending on what the final color will be. The bases used for darker colors (ie
that need more tint) tend to be well under a gallon, with the lighter tint bases
being closer to a gallon.